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CHAPTER 8 I 1 One way to reduce the margin of error in a confidence...

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CHAPTER 8 I 1 One way to reduce the margin of error in a confidence interval is to decrease the confidence coefficient a I II Multiple Choice If a 90 confidence interval estimate for the difference between two population proportions is to be constructed then the confidence coefficient a would be a 0 10 b 0 90 c 0 05 d 0 45 3 If the population deviation o is known and we wish to estimate the population mean with 95 confidence what is the appropriate critical value z to use True or False 2

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